mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
180 lines
4.7 KiB
C
180 lines
4.7 KiB
C
/*********************************************************************
|
|
*
|
|
* Filename: litelink.c
|
|
* Version: 1.1
|
|
* Description: Driver for the Parallax LiteLink dongle
|
|
* Status: Stable
|
|
* Author: Dag Brattli <dagb@cs.uit.no>
|
|
* Created at: Fri May 7 12:50:33 1999
|
|
* Modified at: Fri Dec 17 09:14:23 1999
|
|
* Modified by: Dag Brattli <dagb@cs.uit.no>
|
|
*
|
|
* Copyright (c) 1999 Dag Brattli, All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*
|
|
********************************************************************/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <net/irda/irda.h>
|
|
#include <net/irda/irda_device.h>
|
|
|
|
#define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */
|
|
#define MAX_DELAY 10000 /* 1 ms */
|
|
|
|
static void litelink_open(dongle_t *self, struct qos_info *qos);
|
|
static void litelink_close(dongle_t *self);
|
|
static int litelink_change_speed(struct irda_task *task);
|
|
static int litelink_reset(struct irda_task *task);
|
|
|
|
/* These are the baudrates supported */
|
|
static __u32 baud_rates[] = { 115200, 57600, 38400, 19200, 9600 };
|
|
|
|
static struct dongle_reg dongle = {
|
|
.type = IRDA_LITELINK_DONGLE,
|
|
.open = litelink_open,
|
|
.close = litelink_close,
|
|
.reset = litelink_reset,
|
|
.change_speed = litelink_change_speed,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int __init litelink_init(void)
|
|
{
|
|
return irda_device_register_dongle(&dongle);
|
|
}
|
|
|
|
static void __exit litelink_cleanup(void)
|
|
{
|
|
irda_device_unregister_dongle(&dongle);
|
|
}
|
|
|
|
static void litelink_open(dongle_t *self, struct qos_info *qos)
|
|
{
|
|
qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
|
|
qos->min_turn_time.bits = 0x7f; /* Needs 0.01 ms */
|
|
}
|
|
|
|
static void litelink_close(dongle_t *self)
|
|
{
|
|
/* Power off dongle */
|
|
self->set_dtr_rts(self->dev, FALSE, FALSE);
|
|
}
|
|
|
|
/*
|
|
* Function litelink_change_speed (task)
|
|
*
|
|
* Change speed of the Litelink dongle. To cycle through the available
|
|
* baud rates, pulse RTS low for a few ms.
|
|
*/
|
|
static int litelink_change_speed(struct irda_task *task)
|
|
{
|
|
dongle_t *self = (dongle_t *) task->instance;
|
|
__u32 speed = (__u32) task->param;
|
|
int i;
|
|
|
|
/* Clear RTS to reset dongle */
|
|
self->set_dtr_rts(self->dev, TRUE, FALSE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* Go back to normal mode */
|
|
self->set_dtr_rts(self->dev, TRUE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* Cycle through avaiable baudrates until we reach the correct one */
|
|
for (i=0; i<5 && baud_rates[i] != speed; i++) {
|
|
/* Set DTR, clear RTS */
|
|
self->set_dtr_rts(self->dev, FALSE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* Set DTR, Set RTS */
|
|
self->set_dtr_rts(self->dev, TRUE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
}
|
|
irda_task_next_state(task, IRDA_TASK_DONE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function litelink_reset (task)
|
|
*
|
|
* Reset the Litelink type dongle.
|
|
*
|
|
*/
|
|
static int litelink_reset(struct irda_task *task)
|
|
{
|
|
dongle_t *self = (dongle_t *) task->instance;
|
|
|
|
/* Power on dongle */
|
|
self->set_dtr_rts(self->dev, TRUE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* Clear RTS to reset dongle */
|
|
self->set_dtr_rts(self->dev, TRUE, FALSE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* Go back to normal mode */
|
|
self->set_dtr_rts(self->dev, TRUE, TRUE);
|
|
|
|
/* Sleep a minimum of 15 us */
|
|
udelay(MIN_DELAY);
|
|
|
|
/* This dongles speed defaults to 115200 bps */
|
|
self->speed = 115200;
|
|
|
|
irda_task_next_state(task, IRDA_TASK_DONE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
|
|
MODULE_DESCRIPTION("Parallax Litelink dongle driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("irda-dongle-5"); /* IRDA_LITELINK_DONGLE */
|
|
|
|
/*
|
|
* Function init_module (void)
|
|
*
|
|
* Initialize Litelink module
|
|
*
|
|
*/
|
|
module_init(litelink_init);
|
|
|
|
/*
|
|
* Function cleanup_module (void)
|
|
*
|
|
* Cleanup Litelink module
|
|
*
|
|
*/
|
|
module_exit(litelink_cleanup);
|